Simple fact is more people play on Xbox Live (between Xbox One and Xbox 360) than they do on the PlayStation Network (between PS3 and PS4). Why is this? Well, the Xbox 360 turned out to be a pretty great machine after the initial RRoD stuff. People [i]still[/i] aren't sure they want to make the leap to the Xbox One because they enjoy playing the games that developers still continue to make for it. Once developers officially kill last gen, and once backwards compatibility comes to more games, I'm sure more people will jump ship. TL;DR - While PS4 has been outselling the Xbox One, more people play on Xbox Live and Microsoft continues to dominate the market share for online console gaming.